Telkom refusing to cancel adsl line.

Telkom is preventing me from cancelling my ADSL line since September 2020, although i now have fibre with a different network. This despite my 2 year contract being over nearly 2 years ago and me being on a month to month option now. Ive logged this 3 times already and now when i want to cancel via the app. it 's giving me an error claiming they cant trace my account. However they deduct monthly.